Horizontally movable damper



July 28, 1953 c. HENNIG HORIZONTALLY MovABLE DAMPER 2 Sheets-Sheet lFiled Jan. 17, 1951 INVENTOR Charles Hennig ATTORNEY July 28, 1953 C.HENNIG HORIZONTALLY MOVABLE DAMPER 2 sheets-sheet 2 Filed Jan. 17, 19511111/1111111 Il .Il J l vllllllll INVENTOR Charles Hennig W ATTORNEYPatented July 28, 1953 HORIZONTALLY MOVABLE DAMPER Charles Hennig,Freeport, N. Y., assignor to Morse Boulger Destructor Company, New York,N. Y., a corporation of Delaware Application January 17, 1951, SerialNo; 206,369

6 Claims.

This invention relates generally to furnaces and in particular to damperstructures therefor. The invention has special applicability toincinerators of the type disclosed in U. S. Patent No.'2,5l4,657, issuedJulyk 11, 1950.`

The general object of the invention is to provide a novel, eiiicient,and easily installed and operated damper structure for the flue of alarge furnace.

Herein a furnace of the incinerator type mentioned above, generallyreferred to as a destruc- 1 tor, has been adopted for the p-urposes ofillustrating the applicability ofthe invention. Furnace installations ofthis class are commonly Very massive, and the flue is accordingly oflarge cross section, requiring a damper of such rsize vand weight thatconsiderations of space and of handling are of extreme importance.

As a damper for the flue of a furnace lof this class may be six or morefeet in height, installation of the damper for vertical movement mayeven require breaking through the ceiling of the furnace room in whichthe destructor stands. This has been done heretofore in many such installations; but it is costly and otherwise undesirable. Thus an-objectof the present invention is to provide a novel structure wherein adamper may be operated horizontally so that extraordinary Vertical rangeis unnecessary. Further the structure of the present invention obviatesythe employment of elevator machinery usually required to lift a heavydamper, for herein the damper always remains at the same level.

Another object is to provide a structure which may form a horizontalsection of the ue of a destructor or other furnace, said section havinga bay extending therefrom and a trackvextendn ing across said sectionand into said bay, whereby the damper may be rollably mounted on saidtrack and readily rolled back and forth between open and closedpositions. Thus the effort required to open and close vthe damper ismerely that necessary to roll it, such effort being obviously much lessthan required to raise it in the usual manner. Further the structureutilizes spaceat the level of the ue and thereby avoids any cutting'through of a furnace room ceiling.

Where a heavy damper is merely to be rolled it will be plain that it maybe opened and closed by manually operable means, and elevating machineryneed not form a part of the furnace installation.

Another object of the invention is to provide such a structure havingsimple means for manual operation whereby an attendant may readily ad- 2just the damper by pulling on one limb or the other of a catenaryhanging conveniently v'alcove the furnace roomfloor.

These and other objects ofthe invention will be more fully understoodfrom the following description and from the drawings, in which:

Fig. 1 is a side elevation of the structureembodying the invention;

Fig. 2 is a rear elevation;

Fig. 3 is a plan view;

Fig. 4 is the section 4-4 of Fig. 2;

Fig. 5 is an elevation of that side of the structure opposite to theside seen in Figi;

Fig. 6 is the section 6 6 of Fig. 2; and

Fig. 7 is the section 7 7 of Fig. 2.

In Figs. l through 7, which relate specifically to the damper structure,the only portion of the destructor vseen is an indication, in dottedlines, of the outline of the flue which the damper structure serves. Y

Referring now to the drawings in which like reference charactersdenote-similar parts, the damper apparatus comprises a box, as best seenin Figs. 2 and 3, having two portions, 35 to the left in these figures,and 3S to the right. Portion 35 is actually the terminal section of ilueIl of the destructor and joins with the chimney of a building in whichthe destructor is installed. Portion 3S provides a bay protruding fromthe side of portion 35 and is adapted to house the damper 3'! whenvthelatter is in opened position. The damper is shown in closed (solidlines) and in opened (dotted lines) positions in Fig. 2.

The entire structure is supported'by upright channels 33, 39, lil) and4l (best seen in Fig. 3), mounted on a floor 42. g

Portion 35 of the boX is essentially a short conduit of rectangularcross section, as best seen in Fig. 2. The front of this conduitconnects with the rear of flue Il, and-the rear of the conduit with theentrance to the chimney of the furnace.

That side wall of portion 35 to the left in Figs. 2 and 3 is a plate 43;the side wall to the right comprises two plates, 54 and 55, as best seenin Figs. 3 and 5, the plates being separated to provide a doorway itbetween the two portions of the box through which the damper may bemoved. Plate 43 is secured by suitable means, such as rivets el to theweb of upright channel 38 (Fig. 1). Plate 44 is secured,v as by rivets48, to the web of upright channel 39; and plate 45 is secured, asbyrivets 49, to the web of upright rchannel lll (Figs. 3 and 6). Portion35 is provided with a floor plate 5t (Fig. 2) which n .i is connected tothe lower edge of plate 43 by an angle l and to the lower edges ofplates 44 and #l5 by a similar angle 52. The side wall plates 43, 44 and55 are reinforced against buckling strains by angles 53, 54 and 55; andthe door plate is reinforced by angles 56. Angles 54, eil and relatingto side wall plates 44 and i5 are interrupted at doorway 'd (Fig. 6).

Portion 36 of the box is a bay or envelope `for receiving the damperwhen the latter is in opened position as shown in dotted lines in Fig,2. The front and rear walls of this portion comprise plates 5l and 58respectively. The youter edge of each plate is suitably secured to `aliange of upright channel 4l. See Figs. 2, 3 and 5. The inner edges ofthe plates "il and 58, where the two portions of the 'ocx are joined,are respectively secured as by rivets to a flange or" upright channel39, and to a flange of upright channel 4E (Figs. 3 and 5). A roof forportion 3S of the box is provided in the .form of a .horizontal channels3 to the iianges or which the upper edges or the plates El 53 aresuitably secured. lSee 2. -A bottom Vfor the same portion of the box isprovided by another channel $4 to the flanges oi" which the lower edgesoi the plates 5l and 58 are secured. Channels S3 and Gli extend fromupright channel Ai to channels 59 and llt, as shown. Channel il sealsthe outer end of portion 35, so this por-tion is everywhere sealedexcept at doorway l5 communicating with portion 35.

At the upper edges of plates 133, s and d5 are two angles 65. A channel@E bridges portion 35 of the box transversely, as best shown in Figs. 2and 3, and is aligned. with channel S3 (see Fig. 3, particularly). Theends of channel are supported -by angles E5 and one end is rigidlyconnected to channel @3 by means of a tie 5l (Figs. 2 and 3). The tie Elis a short section lof channel stock, and serves also as `a harige',

like hangers 63, S3 and le, for a trolley system described below.

Fig. 7 is the section 'iL-'i of Fig. 2 and is considerably venlarged toshow structural details oi part ci the trolley system, which comprises,in part, a pair of opposed channels il and l2 which entend from hanger513 to hanger 'it and are secured to the three hangers and the tie El.Supported by and between channels ll and 'l2 is trolley track member'53, a cross section of whif11o is seen in Fie. '7.

Rollaloly mounted within the track member 'i3 are four-wheeled trolleyslil and i5 (see Figs. 2 and 3) Two wheels of each trolley are mounted onone side of the track member, and the other two wheels thereof on theother side of the member (Fig. 7). From each trolley depends, betweenthe sides of the track member and the channels 'il and l2, a bolt. Thebolt relating to trolley 'Ell is designated le; that relating to trolleyle is designated ll. A narrow plate 'i8 extends between bolts "i5 and l?and is suitably secured thereto by -means of nuts l. Mounted on theplate E3 between bolts l and 'il and secured thereto by nuts Si) are twohook bolts Si and El?. The damper is provided with straps 83 and Se atits upper corners, and the damper is suspended from the hook bolts andthe trolleys by engagement of hook bolt 8i by strap 83 and by engagementof hook bolt 82 by strap 84, as best seen in Fig. 2.

Rotatably mounted on channel 55 is a pocketed sheave 85; and similarlymounted ron the outer end of portion 35 of the box is a like sheave 85.

4 It will be noted on Fig. 3 that channel 65 is slotted to accommodatesheave 65, and that channel 63 is slotted to accommodate sheave Se.Attached to plate 'i8 at 8l is a chain Se which passes around sheave 35,extends to and around sheave 8S and back to the plate 'i8 at its ends 8land 89.

The shaft 9i! of sheave 86 is extended forwardly, as shown in Fig. andalso mounted on this shaft in iront of portion of box, is another andlarger sheave 9 i. Mounted on she ve Si is an endless chain 92 (Figs. 2and 3), the catenary 83 of which may be conveniently utilized in usualmanner to rotate the sheaves and se .move the trolley and damper backand forth from one portion oi the box to the other, as shown in Fig. 2.Viiccordinely the damper door 3l may be readily moved to close or toopen the nue completely or to any desired adjusted position between`fully closed and fully open position.

The terms and expressions which have been employed herein are used termsof description and not of limitation, and there is no intention in theuse of such terms and expressions of excluding any equivalent of thefeatures shown and described or portions thereof, but it is recognizedthat various niodications are possible within the scope of inventionclaimed.

What lis claimed is:

l. In a iue, an enclosed bay to the side of l nue, a doorway betweensaid flue and bay, a trolley track mounted in and enclosed by said flueand bay and extending through said doorway, a plurality of wheeledtrolleys mounted on said track, a bolt depending from each of saidtrolleys, an elongate plate secured to said bolts, a damper suspendedfrom said plate, and means for rolling said trolleys on said track,including a iirst grooved sheave rotatably mounted in said iiue and asecond grooved sheave rotatably mounted in said bay, and a chain trainedfrom said trolley over both sheaves and having one or its ends s curedto one end of said plate and its other end to the other end of saidplate back to said trolley, links of said chain. being received in thegrooves of said sheaves, `and mechanism for rotating said second.sheave.

2. in a furnace flue, a li rizontal section having an enclosed bayextending from one side thereof; a trolley track extending across saidsection and into said bay; a trolley mechanism rollably mounted on saidtrack; a damper door suspended from said trolley mechanism; a iirstsheave mounted on section and a second sheave mounted on said bay; saidtrolley inecha nism including two spaced apart sets or" wheels each sethaving a bolt depending therefrom, an elongate plate secured to thelower ends of bolts and providing means on which to door; a chainextending from one end of plate over both sheaves and back to the otherof said plate; and means for rotating one of s sheaves whereby saidchain is driven to eiiect movement o said trolley mechanism on saidtrack to move said damper door to open and to closed .position in saidflue.

3. In a furnace flue, a horizontal section havu ing an enclosed bayextending from one side thereof and having a doorway into said enclosedbay; a trolley track extending across said and into said bay andenclosed therein; a trolley rollably mounted on said track; a damperdoor suspended from said trolley; a first sheave mounted on said sectionand a second sheave mounted on said bay; a chain extending from saidtrolley over both sheaves and back to said trolley; and means forrotating one of said sheaves whereby said chain is driven to eiectmovement of said trolley to move said damper to open and to closedposition in said flue, said means comprising a third sheave coaxial withsaid second sheave and adapted to rotate therewith, and an endless chainmounted on said third sheave for manual actuation of said third sheave.

4. In a flue defined by two vertical and two horizontal Walls; adamper-door housing eX- tending laterally at right angles to said Hueand having side walls, and a top, a bottom and an end wall, an open endopposite said end wall, a passageway in one of said vertical walls ofsaid ilue, the ends of said side, top and bottom walls of said housingbeing connected to said one of said vertical i-lue walls so that saidopen end is in registry with said passageway, thus providing a doorwayfor a damper door between the interior of said housing and said flue, axedly secured horizontal track crosswise of said flue and extendingthrough said doorway into said housing, a plurality of wheeled trolleyshaving wheels rollable on said track, damper door suspending membersdepending from said wheeled trolleys, a damper door suspended on saidmembers and movable through said doorway, a sheave mounted for rotationin said flue adjacent one end of said track, a sheave mounted forrotation in said housing adjacent the other end of said track, a chaintrained over said sheaves and secured to said damper door, and operativeupon rotation of one of said sheaves in one direction to move saidtrolleys along said track thereby carrying said damper door through saiddoorway into said flue and in the other direction to move said trolleysin the opposite direction along said track thereby carrying said damperdoor through said doorway into said housing, and means for rotating oneof said sheaves.

5. In a flue deiined by two vertical and two horizontal walls; adamper-door housing eX- tending laterally at right angles to said ue andhaving side walls, and a top, a bottom and an end wall, an open endopposite said end wall, a passageway in one of said vertical walls ofsaid flue, the ends of said side, top and bottom walls of said housingbeing connected to the vertical ue wall which has said passageway sothat the open end is in registry with said passageway, thus providing adoorway for a damper door between the interior of said housing and saidnue, a xedly secured horizontal track crosswise of said flue andextending through said doorway into said housing, a plurality of wheeledtrolleys having wheels rollable on said track, a bolt depending fromeach of said wheeled trolleys, a narrow plate secured to the lower endsof said bolts, a damper door suspended from said plate and movablethrough said doorway, a rotatable sheave mounted for rotation adjacenteach end of said track, a chain trained over said sheaves and having itsends secured to said plate, whereby upon rotation of one of said sheavesin one direction said trolleys roll along said track and carry saiddamper door through said door- CII way into said flue and upon rotationof that sheave in the opposite direction said trolleys roll along saidtrack in said opposite direction and carry said damper door through saiddoorway into said housing, and means including a third sheave andmanually operated means for rotating one of said rst mentioned sheavesin the other direction to move said trolleys in the opposite directionalong said track thereby carrying said damper door through said doorwayinto said housing.

6. In a flue defined by two vertical and two horizontal walls; adamper-door housing eX- tending laterally at right angles to said iiueand having vertical side walls, and a top, a bottom and an end wall andan open end opposite said end wall, a passageway in one of said verticalwalls of said flue, the ends of said side, top and bottom walls of saidhousing being connected to the vertical flue wall which has saidpassageway with its open end in registry with said passageway, thusproviding a doorway for a damper door between the interior of saidhousing and said flue, a fixedly secured horizontal track within andcrosswise of said iiue and extending through said doorway into saidhousing adjacent the top wall of said housing, a plurality of wheeledtrolleys having wheels rollable on said track, a bolt depending fromeach of said wheeled trolleys, a narrow plate secured to the lower endsof said bolts, damper-door hangers depending from said plate, a damperdoor movable through said doorway, upwardly extending reinforcing strapssecured to said door and suspended from said hangers, a rst sheavemounted for rotation in said ue adjacent one end of said track, a secondsheave having a shaft extending beyond a side wall of said housing andmounted for rotation in said housing adjacent the other end of saidtrack, a chain trained over said sheaves and secured to said plate andoperative upon rotation of one of Said sheaves in one direction to movesaid trolleys along said track thereby carrying said damper door throughsaid doorway into said flue and in the other direction to move saidtrolleys in the opposite direction along said track thereby carryingsaid damper door through said doorway into said housing, a third sheavemounted on said shaft outside of said housing, and a chain accessiblefor manual operation trained over said third sheave for rotating saidthird sheave thereby to move said damper door to open and to closedpositions.

CHARLES HENNIG.

References Cited in the ille of this patent UNITED STATES PATENTS NumberName Date 164,311 Little June 8, 1875 610,076 McClure Aug. 30, 1898620,006 Williams Feb. 21, 1899 1,849,022 McLimans Mar. 8, 1932 FOREIGNPATENTS Number Country Date 4,565 Great Britain Apr. 1, 1886

